This is a Smoketech version of the Bolt made of a anodized aluminum and has a magnetic switch. The anodized surface has a great sheen to it and looks great. It is designed to hold a protected 18650 3.7 volt button or flat top battery. This will work excellent with a 1.5 ohm dual coil cartomizer or a 1.7, 2.0 or 2.5 ohm single coil cartomizer. The bolt will also work great with most tanks and clearomizers because of the side mounted magnetic switch and the 510/eGo connection on top.